DD 150-U

About this documentation

• Read this documentation before initial operation or use. This is a prerequisite for safe, trouble-free handling and use of the product.
  
• Observe the safety instructions and warnings in this documentation and on the product.
  
• Always keep the operating instructions with the product and make sure that the operating instructions are with the product when it is given to other persons.
  

Explanation of symbols used

Warnings

Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:

Symbols in the documentation

The following symbols are used in this document:

	Read the operating instructions before use.
	Instructions for use and other useful information
	Dealing with recyclable materials
	Do not dispose of electric equipment and batteries as household waste

Symbols in the illustrations

The following symbols are used in illustrations:

	These numbers refer to the corresponding illustrations found at the beginning of these operating instructions
	The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text
	Item reference numbers are used in the overview illustrations and refer to the numbers used in the product overview section
	This symbol is intended to draw special attention to certain points when handling the product.

Symbols on the product

"Must do" symbols

The following "must do" symbols are used on the product:

	Wear eye protection
	Wear a hard hat
	Wear ear protection
	Wear protective gloves
	Wear protective footwear
	Wear light respiratory protection
	Read the operating instructions before use

Status indicator

The following symbols are used on the product:

	Theft protection indicator
	Drilling performance indicator
	Service indicator

Product-dependent symbols

The following symbols can be used on the product:

	Do not transport by crane
	Equipped with theft protection system
	Amps
	Volts
	Alternating current
	Watts
	Hertz
	Rated speed under no load
	Diameter
	Millimeters
	Revolutions per minute
	Wireless data transfer

Information notices

On the drill stand, base plate and diamond core drilling machine

	On the drill stand and the vacuum base plate Top : An additional means of securing the drill stand must be employed when the machine is used for horizontal drilling with the vacuum securing method. Bottom : Use of the vacuum securing method for overhead drilling with the drill stand is not permissible.
	On the diamond core drilling machine Use of the water collection system in combination with a wet-type industrial vacuum extractor is mandatory for upward wet drilling.

Product information

products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.

• Write down the serial number in the table below. You will be required to state the product details when contacting Hilti Service or your local Hilti organization to inquire about the product.
  Product information

  Diamond core drilling machine	DD 150-U
  Generation:	02
  Serial no.:

Declaration of conformity

We declare, on our sole responsibility, that the product described here complies with the applicable directives and standards. A copy of the declaration issued by the certification department can be found at the end of this documentation.
The technical documentation is filed here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | 86916 Kaufering, Germany

General power tool safety warnings

WARNING Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
Work area safety

• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
  
• Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
  
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
  

Electrical safety

• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
  
• Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
  
• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
  
• Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
  
• When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
  
• If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.
  

Personal safety

• Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
  
• Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personal injuries.
  
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
  
• Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
  
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
  
• Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
  
• If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
  
• Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.
  

Power tool use and care

• Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
  
• Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
  
• Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
  
• Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
  
• Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
  
• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
  
• Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
  
• Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
  

Service

• Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
  

Diamond drill safety warnings

• When performing drilling that requires the use of water, route the water away from the operator’s work area or use a liquid collection device. Such precautionary measures keep the operator’s work area dry and reduce the risk of electrical shock.
  
• Operate power tool by insulated grasping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.
  
• Wear hearing protection when diamond drilling. Exposure to noise can cause hearing loss.
  
• When the bit is jammed, stop applying downward pressure and turn off the tool. Investigate and take corrective actions to eliminate the cause of the bit jamming.
  
• When restarting a diamond drill in the workpiece check that the bit rotates freely before starting. If the bit is jammed, it may not start, may overload the tool, or may cause the diamond drill to release from the workpiece.
  
• When securing the drill stand with anchors and fasteners to the workpiece, ensure that the anchoring used is capable of holding and restraining the machine during use. If the workpiece is weak or porous, the anchor may pull out causing the drill stand to release from the workpiece.
  
• When drilling through walls or ceilings, ensure to protect persons and the work area on the other side. The bit may extend through the hole or the core may fall out on the other side.
  
• Do not use this tool for overhead drilling with water supply. Water entering the power tool will increase the risk of electric shock.
  

Additional safety instructions

Personal safety

• Do not tamper with or attempt to make alterations to the tool.
  
• Keep the grips dry, clean and free from oil and grease.
  
• Make sure that the side handle is fitted correctly and tightened securely. Always hold the tool firmly with both hands on the grips provided.
  
• Assemble the mount correctly before installing the power tool. Correct assembly is important in order to avoid the risk of collapse.
  
• Before starting to use the power tool, secure it firmly in the mount. Slippage of the power tool in the mount can lead to loss of control.
  
• Set up the mount on a firm, smooth and horizontal surface. It will not be possible to guide the power tool smoothly and safely if the mount can slip or wobble.
  
• Check the nature of the surface. Rough surfaces may reduce holding power. Coatings or composite materials may pull away from the surface while you are working.
  
• Do not overload the device and do not use it as a substitute for a ladder or platform. Overloading the device or standing on it may shift its center of gravity to a higher position, causing it to tip over.
  
• Improve the blood circulation in your fingers by relaxing your hands and exercising your fingers during breaks between working.
  
• The machine is not intended for use by debilitated persons who have received no special training. Keep the machine out of reach of children.
  
• Avoid touching rotating parts. Switch the machine on only after it is in position at the workpiece. Touching rotating parts, especially rotating accessory tools, may lead to injury.
  
• When working, always guide the supply cord, the extension cable, the suction hose and the water hose to the rear and away from the machine. This reduces the risk of tripping over cables or hoses while work is in progress.
  
• Avoid skin contact with drilling slurry.
  
• Dust from material such as paint containing lead, some wood species, minerals and metal may be harmful. Contact with or inhalation of the dust may cause allergic reactions and/or respiratory diseases among operators or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and beech dust especially in conjunction with additives for wood conditioning (chromate, wood preservative). Use a dust removal system that is as effective as possible. To achieve a high level of dust collection, use a suitable vacuum extractor of the type recommended by Hilti for wood dust and/or mineral dust and which is designed for use with this tool. Ensure that the workplace is well ventilated. The use of a dust mask of filter class P2 is recommended. Observe national regulations applicable to the materials you intend to work with.
  

Careful handling and use of electric tools and machines

• Secure the workpiece. Use clamps or a vice to secure the workpiece. The workpiece is thus held more securely than by hand and both hands remain free to operate the power tool.
  
• Ensure that the accessory tools used have a mounting system that is compatible with the drilling machine and that they are secured in the chuck correctly.
  
• Switch the power tool off and unplug the supply cord in the event of a power failure or interruption in the electric supply. This will prevent accidental restarting when the electric power returns.
  

Electrical safety

• Before beginning work, check the working area (e.g. using a metal detector) to ensure that no concealed electric cables or gas and water pipes are present. External metal parts of the machine may become live, for example, when an electric power line is damaged accidentally. This presents a serious risk of electric shock.
  
• Never operate the machine without the accompanying PRCD (machines without PRCD: Never operate the machine without an isolating transformer). Test the PRCD each time before use.
  
• Check the machine’s supply cord at regular intervals and have it replaced by a qualified specialist if found to be damaged. If the machine’s supply cord is damaged it must be replaced with a specially-prepared and approved supply cord available from Hilti Customer Service. Check extension cords at regular intervals and replace them if found to be damaged. Do not touch the supply cord or extension cord if it is damaged while working. Disconnect the supply cord plug from the power outlet. Damaged supply cords or extension cords present a risk of electric shock.
  

Workplace

• When drilling through walls, secure (cordon off) the area behind the wall, as material or the core may fall out on the other side of the wall. When drilling through ceilings, secure (cordon off) the area below as drilled material or the core may drop out and fall down.
  
• Use of the water collection system in combination with a wet-type industrial vacuum extractor is mandatory for upward wet drilling.
  
• Use of the vacuum fastening method for upward drilling is prohibited.
  
• An additional means of securing the drill stand must be employed when the machine is secured with the vacuum securing method (accessory) for horizontal drilling.
  
• Do not use a hammer or other heavy object when making adjustments to the base plate.
  
• Ensure that the workplace is well ventilated. Exposure to dust at a poorly ventilated workplace may result in damage to the health.
  
• Approval must be obtained from the site engineer or architect prior to beginning drilling work. Drilling work on buildings and other structures may influence the static equilibrium of the structure, especially when steel reinforcing bars or load-bearing components are cut through.
  
• It is recommended that rubber gloves and non-skid shoes are worn when working outdoors.
  

Personal safety

• The diamond core drilling machine and the diamond core bit are heavy. There is a risk of crushing parts of the body. The user and persons in the vicinity must wear suitable protective goggles, a hard hat, ear defenders, protective gloves, protective footwear and light respiratory protection while the tool is in use.
  

Parts of the tool and operating controls

1. Water swivel / suction head
   
2. Water flow rate indicator
   
3. Side handle
   
4. Water flow regulator
   
5. Water connection
   
6. Gear selector
   
7. Gearing section
   
8. Motor
   
9. On/Off switch
   
10. Grip
    
11. Theft protection indicator (optional)
    
12. Service indicator
    
13. Drilling performance indicator
    
14. Carbon brush cover
    
15. Supply cord with PRCD
    
16. Rating plate
    
17. Interface plate
    
18. Connector screws (water swivel / suction head)
    
19. Cover (water swivel / suction head)
    
20. Suction hose connector
    
21. Chuck
    

Drill stand

1. Grip
   
2. Column
   
3. Carriage
   
4. Carriage lock
   
5. Type identification plate
   
6. Vacuum relief valve
   
7. Vacuum hose connector
   
8. Vacuum seal
   
9. Base plate
   
10. Pressure gage
    
11. Leveling indicator
    
12. Adjusting lever
    
13. Leveling screws
    
14. Hole center indicator
    
15. Depth gage
    
16. Locking pin
    
17. Carriage play adjusting screw
    
18. End stop screw
    
19. Supply cord holder
    

Accessories

1. Star handle
   
2. Lever
   
3. Eccentric pin
   
4. Clamping screw
   
5. Depth gage
   
6. Water collector
   
7. Centering ring
   
8. Centering ring adapter
   
9. Seal
   
10. Machine mount
    
11. Holder
    
12. Water collector
    
13. Seal
    
14. Jack screw
    
15. Wheel assembly
    

Intended use

The product described is an electrically powered diamond core drilling machine. It is designed to be used hand-held for the wet and dry drilling of through-holes and blind holes and, when mounted on the drill stand, for the wet drilling of through-holes and blind holes in (reinforced) mineral materials.

The product described is designed for professional use and may be operated, serviced and maintained only by trained, authorized personnel. This personnel must be informed of any particular hazards that may be encountered. The product described and its ancillary equipment may present hazards when used incorrectly by untrained personnel or when used not as directed.

• The tool may be operated only when connected to a power supply providing a voltage and frequency in compliance with the information given on its type plate.
  
• Observe the national health and safety requirements.
  
• To reduce the risk of injury, use only genuine Hilti tools and accessories.
  

Drilling performance indicator

The diamond core drilling machine has an LED drilling performance indicator.

Symbol	Status	Meaning
	Orange light	Contact pressure too low
	Green light	Contact pressure ideal
	Red light	Contact pressure too high

Service indicator

The diamond core drilling machine has an LED service indicator.

Symbol	Status	Meaning
	Red light Product running	The carbon brushes are badly worn. End of service interval – servicing is due. You can continue working for a number of hours after the indicator first shows, before automatic cut-out is activated. Bring the product to Hilti Service in good time.
	Red light Product not running	The carbon brushes must be replaced.
	Flashing red light	The diamond core drilling machine has overheard or is damaged. See Troubleshooting.

Items supplied

Diamond core drilling machine, operating instructions.

Product properties

If the device is powered by a generator or transformer, the generator or transformer’s power output must be at least twice the rated input power shown on the rating plate of the device. The operating voltage of the transformer or generator must always be within +5 % and -15 % of the rated voltage of the device.

		DD 150-U
Rated current input	120 V	19.5 A
	230 V	10.3 A
Rated power input		2,200 W
Weight of the diamond core drilling machine		8.2 kg
Weight of the drill stand with combination base plate and carriage		13.3 kg
Dimensions, diamond core drilling machine (L×W×H)		20.3 in x 5.1 in x 6.3 in (516 mm x 129 mm x 159 mm)
Dimensions, drill stand (L×W×H)		24.0 in x 9.8 in x 37.5 in (610 mm x 250 mm x 952 mm)
Permissible water supply pressure		≤ 6 bar
Rated speed under no load	1st gear	840 /min
	2nd gear	1,640 /min
	3rd gear	3,070 /min
Protection class		Protection class I (earthed)

Ideal distance of the mark from the hole center

Anchor base plate	10.6 in (270 mm)
Vacuum base plate	11.4 in (290 mm)
Combination base plate	11.4 in (290 mm)

Rated voltage

Rated voltage	100 V	110 V GB	110 V TW	120 V	127 V	220 V	230 V	240 V
Rated current input	15 A	16 A	15 A	19.5 A	18.5 A	10 A	10.3 A	9.9 A
AC frequency	50/60 Hz	50/60 Hz	50/60 Hz	60 Hz	50/60 Hz	50/60 Hz	50/60 Hz	50/60 Hz

Using extension cords

Use only extension cords of a type approved for the application and with conductors of adequate gauge.
Recommended minimum conductor cross-sections and maximum power cord lengths:

Conductor cross-section → ↓ Mains (AC) voltage	1.5 mm²	2.5 mm²	3.5 mm²	4.0 mm²
100 V	Not recommended	Not recommended	25 m	Not recommended
110 V	Not recommended	15 m	Not recommended	30 m
127 V	Not recommended	20 m	Not recommended	35 m
220 V	35 m	65 m	Not recommended	105 m
230 V	40 m	70 m	Not recommended	110 m
240 V	40 m	70 m	Not recommended	110 m

Core bit diameter

		1st gear	2nd gear	3rd gear
Ø core bits (stand-guided drilling, wet)	With water collection system	4.0 in … 6.4 in (102 mm … 162 mm)	1.1 in … 3.4 in (28 mm … 87 mm)	0.5 in … 1.0 in (12 mm … 25 mm)
	Without water collection system	4.0 in … 6.4 in (102 mm … 162 mm)	1.1 in … 3.4 in (28 mm … 87 mm)	0.5 in … 1.0 in (12 mm … 25 mm)
Ø core bits (hand-held drilling, wet)	Without water collection system	4.8 in … 5.2 in (121 mm … 131 mm)	1.6 in … 4.4 in (41 mm … 111 mm)	0.3 in … 1.4 in (8 mm … 36 mm)
Ø core bits (hand-held drilling, dry, HDMU)	With dust removal system	4.8 in … 6.4 in (122 mm … 162 mm)	2.6 in … 4.4 in (67 mm … 112 mm)	·/·
Ø core bits (hand-held drilling, dry, PCM)	With dust removal system	2.0 in … 6.4 in (52 mm … 162 mm)	·/·	·/·

Use of the machine with various items of equipment

Hand-held/ Mounted on the drill stand	Additional systems	Core bit diameter	Drilling direction
hand-held/dry	With dust removal system	1.5 in … 6.4 in (37 mm … 162 mm)	All directions
hand-held/wet	Without water collection system	0.3 in … 5.2 in (8 mm … 132 mm)	Not upwards
hand-held/wet	With water collection system	0.3 in … 2.4 in (8 mm … 62 mm)	All directions
on drill stand/wet	Without water collection system	0.5 in … 6.4 in (12 mm … 162 mm)	Not upwards
on drill stand/wet	With water collection system	0.5 in … 6.4 in (12 mm … 162 mm)	All directions

Securing the drill stand with an anchor

1. Set an anchor that is suitable for the base material. Select the distance to suit the base plate used.
   

   Technical data
   Anchor base plate	10.6 in (270 mm)
   Combination base plate	11.4 in (290 mm)

2. Screw the anchor spindle into the anchor.
   
3. Slip the base plate of the diamond core drilling machine over the spindle and align it.
   
4. Screw the clamping nut on to the spindle but do not tighten it.
   
5. Use the leveling screws to level the base plate. Make sure that the leveling screws are firmly seated against the surface.
   
6. Use a suitable open-end wrench to tighten the clamping nut on the clamping spindle.
   
7. Make sure that the diamond core drilling machine is secure.
   

Securing the drill stand by vacuum

1. Turn all the leveling screws until they project approx. 5 mm underneath the base plate.
   
2. Connect the vacuum connector on the vacuum base plate to the vacuum pump.
   
3. Locate the center point of the hole to be drilled. Draw a line from the center of the hole to be drilled in the direction in which the machine is to be positioned.
   
4. Make a mark on the line at the specified distance from the center of the hole to be drilled.
   

   Technical data
   Combination base plate	11.4 in (290 mm)
   Vacuum base plate	11.4 in (290 mm)

5. Switch on the vacuum pump and press and hold down the vacuum release valve.
   
6. Line up the mark on the base plate with the line.
   
7. When the diamond core drilling machine is correctly positioned, release the vacuum release valve and press the base plate against the work surface.
   
8. Use the leveling screws to level the base plate.
   
9. Make sure that the diamond core drilling machine is secure.
   

Securing the drill stand with jack screw

1. Secure the jack screw to the top end of the rail.
   
2. Position the drill stand on the work surface.
   
3. Use the 4 leveling screws to level the base plate.
   
4. Use the jack screw to apply tension to the drill stand and tighten the locknut on the jack screw.
   
5. Make sure that the diamond core drilling machine is secure.
   

Fitting the hand wheel

The hand wheel can be fitted on either side of the drill stand.

• Fit the hand wheel on to the shaft.
  
• Secure the hand wheel.
  

Fitting the side handle

1. Turn the side handle to release or secure it, as applicable.
   
2. Check that the side handle is fitted correctly and tightened securely.
   

Adjusting the side handle

1. Slacken the side handle by turning it counter-clockwise.
   
2. Position the side handle.
   
3. Secure the side handle by turning it clockwise.
   
4. Check to ensure that the side handle is tightened securely.
   

Adjusting the depth gauge (when using the drill stand)

1. Adjust the depth gauge.
   
2. Secure the depth gauge by tightening the clamping screw.
   

Securing the diamond core drilling machine in the drill stand

1. Turn the hand wheel counter-clockwise and pull the locking pin out.
   
2. Engage the interface plate on to the hook on the drill stand.
   
3. Push the locking pin in and use the hand wheel to tighten it securely (turn clockwise).
   
4. Insert the switch locking device into the grip.
   
   The switch locking device can be used to lock the on/off switch in the “on” position for sustained operation.
   
5. Close the water valve in the side handle.
   
6. Connect the water supply.
   

Detaching the diamond core drilling machine from the drill stand

1. Lock the carriage on the rail with the carriage lock.
   
2. Close the water valve in the side handle.
   
3. Disconnect the water supply.
   
4. Remove the switch locking device from the grip.
   
5. Use the hand wheel to release the locking pin (turn counterclockwise).
   
6. Pull the locking pin out of the slot.
   
7. Pivot the machine away from the drill stand.
   

Enabling a machine equipped with theft protection system (TPS)

1. Plug the supply cord of the diamond core drilling machine into the power outlet.
   
2. Press the "Reset" or "I" button on the PRCD.
   
   • The yellow theft protection indicator LED flashes.
     
3. Hold the TPS key directly against the lock symbol.
   
   • The yellow theft protection indicator LED goes out and the machine is enabled.
     
   If the power supply is interrupted, the product remains ready for operation for approximately 20 minutes. If the interruption is longer, the theft protection system has to be deactivated again with the TPS key.
   

Adjust the play between rail and carriage.

1. Use a hex. socket wrench to tighten the adjusting screws hand-tight.
   

   Technical data
   Tightening torque	5 Nm

2. Slacken the adjusting screws slightly by turning back a 1/4 turn.
   
3. The carriage is correctly adjusted when it remains in position without a diamond core bit but moves down under its own weight when a diamond core bit is fitted.
   

Adjusting the drilling angle when using the drill stand with combination base plate

1. At the foot of the drill stand, release the adjusting lever until the sliding nuts are disengaged.
   
2. Adjust the column to the desired angle.
   
3. Tighten the adjusting lever until the sliding nuts are fully engaged and the column is again secured in position.
   

Connecting the vacuum removal system

1. Unscrew the cover from the water swivel / suction head.
   
2. Push the suction hose into the suction hose connector.
   
3. Close the water valve in the side handle.
   

Fitting the water supply connection

1. Close the cover on the water swivel / suction head.
   
2. Connect the water flow regulator to the diamond core drilling machine.
   
3. Connect the water supply (hose coupling).
   

Fitting the water collection system (accessory)

1. Remove the screw in the drill stand at the front of the rail.
   
2. Push the water collector holder into position.
   
3. Fit the screw and tighten it.
   
4. Fit the water collector between the two movable arms of the water collector holder.
   
5. Press the water collector against the work surface by turning the two screws on the water collector holder.
   
6. Connect a wet-type industrial vacuum extractor to the water collector or establish a hose connection through which the water can drain away.
   

Fitting a diamond core bit in a BI+ chuck

1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
   
2. Open the chuck by turning it in the direction of the "Open brackets" symbol.
   
3. From below, push the diamond core bit into the chuck on the diamond core drilling machine, turning it until the teeth engage.
   
4. Close the chuck by turning it in the direction of the "Closed brackets" symbol.
   
5. Check that the diamond core bit is seated securely in the chuck.
   

Fitting the diamond core bit with an alternative type of chuck

1. Lock the drive spindle with a suitable open-end wrench.
   
2. Tighten the core bit with a suitable open-end wrench.
   

Removing a diamond core bit from a BI+ chuck

1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
   
2. Open the chuck by turning it in the direction of the "Open brackets" symbol.
   
3. Pull the sleeve on the chuck in the direction of the arrow towards the machine. This releases the core bit.
   
4. Remove the core bit.
   

Removing the diamond core bit with an alternative type of chuck

1. Lock the drive spindle with a suitable open-end wrench.
   
2. Use a suitable open-end wrench to remove the core bit.
   

Selecting the speed

• While using one hand to turn the core bit, set the switch to the recommended setting.
  

Portable residual current device (PRCD)

1. Plug the diamond core drilling machine’s supply cord into a grounded socket outlet.
   
2. Press the "I" or "RESET" button on the PRCD.
   
   • The indicator lights up.
     
3. Press the "0" or "TEST" button on the PRCD.
   
   • The indicator goes out.
     

4. Press the "I" or "RESET" button on the PRCD.
   
   • The indicator lights up.
     

Hand-guided dry drilling

• Remove the dust from the core bit.
  

Dry-drilling with dust removal

• To prevent electrostatic effects, use an anti-static vacuum extractor.
  

Use of the two-part hole-starting aid

1. Fit the hole-starting aid into the open end of the diamond core bit.
   
2. When you start drilling apply only light pressure until the core bit has centered itself. Then apply more pressure. Drill a guide cut 1/8"-3/16" deep.
   
3. Release the on/off switch to stop the machine. Wait until the core bit comes to a complete stop.
   
4. Remove the hole-starting aid from the core bit.
   
5. Position the core bit in the guide cut, press the on/off switch and resume drilling.
   

Using a vacuum extractor with power outlet for power tools

1. Secure the side handle in the desired position.
   
2. Optional: Install and use the two-part hole-starting aid.
   
3. Plug the diamond core drilling machine's supply cord into the power outlet of the vacuum extractor.
   
4. Plug the vacuum extractor’s supply cord into the power outlet.
   
5. If connected: press the "Reset" switch or the "I" button of the PRCD.
   
6. Center the diamond core drilling machine where the hole is to be drilled.
   
7. Press the on/off switch on the diamond core drilling machine.
   
   The vacuum extractor will start after the power tool has started. When you switch off the power tool the vacuum extractor will run on for a short time before switching itself off.
   

Using a vacuum extractor without power outlet for power tools

1. Secure the side handle in the desired position.
   
2. Optional: Install and use the two-part hole-starting aid.
   
3. Plug the vacuum extractor’s supply cord into the power outlet.
   
4. If connected: press the "Reset" switch or the "I" button of the PRCD.
   
5. Center the diamond core drilling machine where the hole is to be drilled.
   
6. Press the on/off switch on the diamond core drilling machine.
   
7. To ensure removal of residual dust, let the vacuum extractor run on for a few seconds after you switch off the machine.
   

Working without dust removal

1. Secure the side handle in the desired position.
   
2. Optional: Install and use the two-part hole-starting aid.
   
3. Plug the supply cord into the power outlet and press the “Reset” switch or the “I” button on the PRCD.
   
4. Center the diamond core drilling machine where the hole is to be drilled.
   
5. Press the on/off switch on the diamond core drilling machine.
   

Hand-guided wet drilling without water collection system

1. Secure the side handle in the desired position.
   
2. Optional: Install and use the two-part hole-starting aid.
   
3. Plug the supply cord into the power outlet and press the “Reset” switch or the “I” button on the PRCD.
   
4. Center the diamond core drilling machine where the hole is to be drilled.
   
5. Slowly open the water flow regulator until the water flows at the desired rate. The indicator on the side handle enables you to check the water flow.
   
6. Press the on/off switch on the diamond core drilling machine.
   

Hand-guided wet-drilling with the water collection system

1. When using a vacuum extractor: Start the wet vacuum extractor and open the water supply.
   
2. Secure the side handle in the desired position.
   
3. Optional: Install and use the two-part hole-starting aid.
   
4. Plug the supply cord into the power outlet and press the “Reset” switch or the “I” button on the PRCD.
   
5. Center the diamond core drilling machine where the hole is to be drilled.
   
6. Slowly open the water flow regulator until the water flows at the desired rate. The indicator on the side handle enables you to check the water flow.
   
7. Press the on/off switch on the diamond core drilling machine.
   

Wet-drilling with the drill stand

1. Slowly open the water flow regulator until the water flows at the desired rate.
   
2. Switch the machine to continuous operation with the continuous running lock.
   
3. Release the carriage lock.
   
4. Turn the hand wheel until the diamond core bit is in contact with the work surface.
   
5. When you start drilling apply only light pressure until the core bit has centered itself. Then apply more pressure.
   
6. Watch the drilling performance indicator and adjust contact force accordingly.
   

Using the Rota-Rail (column swivel)

1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
   
2. Remove the end stop screw from the end of the rail.
   
3. Attach the Rota-Rail so that the toothed racks are facing the same direction.
   
4. Tighten the screw on the Rota-Rail securely.
   
5. Release the carriage lock and run the carriage along the rail on to the Rota-Rail.
   
6. Slacken the securing screws of the Rota-Rail and turn the device to the left or right with the Rota-Rail. This will give you access to the drillhole.
   
7. Remove the core or change the core bit.
   
8. Turn the tool with the Rota-Rail back to its original position and tighten the securing screws of the Rota-Rail. Move the tool back to the column of the stand to resume work.
   
9. After removing the Rota-Rail, refit the end stop screw to the end of the rail.
   

Procedure in the event of the core bit jamming

If the bit jams the safety clutch disengages. The electronic control system then switches the motor off and subsequently on again; this is done twice without manual intervention by the user. If this does not free the core bit, the electronic control system switches the motor off for 90 seconds. You can free a jammed bit manually, as follows:

Using the hand wheel to free the core bit

1. Unplug the supply cord from the power outlet.
   
2. Free the core bit from the base material by turning the hand wheel.
   
3. Plug the supply cord into the power outlet.
   
4. Resume the drilling operation.
   

Using an open-end wrench to free the core bit

1. Unplug the supply cord from the power outlet.
   
2. Grip the diamond core bit with a suitable open-end wrench close to the connection end and turn the diamond core bit to free it.
   
3. Plug the supply cord into the power outlet.
   
4. Resume the drilling operation.
   

Care and maintenance

Care

• Carefully remove any dirt that may be adhering to parts.
  
• Clean the air vents carefully with a dry brush.
  
• Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as these may attack the plastic parts.
  

Maintenance

• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
  
• Do not operate the product if signs of damage are found or if parts malfunction. Have it repaired immediately by Hilti Service.
  
• After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
  

Replacing the carbon brushes

1. Open the carbon brush covers on the left-hand and right-hand sides of the motor.
   
2. Take note of how the carbon brushes are fitted and how the conductors are positioned. Remove the worn carbon brushes from the diamond core drilling machine.
   
3. Fit the new carbon brushes, positioning them exactly the same as the old ones fitted previously.
   
   Take care to avoid damaging the insulation on the indicator lead as you insert the brushes.
   
4. Screw on the carbon brush covers on the left- and right-hand side of the motor.
   
5. Run in the carbon brushes by letting the machine run under no load for at least 1 minute without interruption.
   
   After replacing the carbon brushes, the indicator lamp will go out after the machine has run for approx. one minute.
   

Transport and storage

• Open the water flow regulator before stowing away the diamond core drilling machine.
  

The diamond core drilling machine is not in working order.

The diamond core drilling machine is in working order